vgm kega ym2612

Avanze · Post by **Avanze** » Tue Apr 29, 2008 1:02 pm

Is there anyway to get the source code of Kega's YM612 into the vgm plugin? I don't think Gens is 100% accurate, it certainly has problems with Ghostbusters.

neologix · Post by **neologix** » Tue Apr 29, 2008 1:06 pm

i can't even count how many times this question has been asked. i can't even count how many times i've asked steve snake myself for this particular request.

in short, the answer is "no, we cannot get kega source code of any kind."

Avanze · Post by **Avanze** » Tue Apr 29, 2008 1:48 pm

Thanks for the response, neologix. Do you know what is causing the problem with Ghostbusters? Track number 10, neither Gens nor the MAME core can play it correctly. What is the accuracy of these cores?

SmartOne · Post by **SmartOne** » Tue Apr 29, 2008 7:42 pm

This is a question from inexperience, but is decompiling the program a possibility (even though it might be difficult?)

Richter X · Post by **Richter X** » Tue Apr 29, 2008 10:40 pm

No idea, but there is one instrument that's exclusive to the GEMS driver that causes problems on anything that isn't KEGA Fusion, or an actual Genesis. It can be heard in Spiderman: The Animated Series, Comix Zone, Flashback, and some other games. Here's how it should sound on an actual Genesis.

http://www.mediafire.com/?24gnmtobitc

(Can someone please put that up somewhere permanent? Particularly on some Wiki or something?)

TmEE recorded this. It's track 03 from the Sound Test of Flashback. Notice the difference between it, Kega, and Gens. It doesn't sound too bad on Kega, but that guy won't say anything on how to fix it. Gotta love that guy. :roll:

Knurek · Post by **Knurek** » Wed Apr 30, 2008 11:24 am

Apparently it's some secret 2operator mode YM2612 has.
I'm not sure, but maybe the new Genesis emulator Regen does support that? It's open source, so finding what makes the stuff tick should be no problem with it.

Avanze · Post by **Avanze** » Wed Apr 30, 2008 11:55 am

I just checked Regen and track number 10 from the sound test of Ghostbusters is wrong. The only emulator, it seems, that can play this track correctly is Kega.

SmartOne · Post by **SmartOne** » Wed Apr 30, 2008 8:08 pm

I love Kega. :kiss:

(I guess my question above is too stupid to be answered... :cry:

)

Avanze · Post by **Avanze** » Thu May 01, 2008 4:52 am

SmartOne wrote:I love Kega.

I do too, but I think I was taking it for granted as I recorded all my mp3 using the Gens core and frankly it just does not compare to the accuracy of Kega. I believe it is worth the time and effort to record directly from Kega, although this means finding the occasional elusive sound test.

neologix · Post by **neologix** » Thu May 01, 2008 2:27 pm

Richter X wrote:No idea, but there is one instrument that's exclusive to the GEMS driver that causes problems on anything that isn't KEGA Fusion, or an actual Genesis. It can be heard in Spiderman: The Animated Series, Comix Zone, Flashback, and some other games. Here's how it should sound on an actual Genesis.

http://www.mediafire.com/?24gnmtobitc

(Can someone please put that up somewhere permanent? Particularly on some Wiki or something?)

TmEE recorded this. It's track 03 from the Sound Test of Flashback. Notice the difference between it, Kega, and Gens. It doesn't sound too bad on Kega, but that guy won't say anything on how to fix it. Gotta love that guy.

which track in the vgm set is it? i can decompose the vgm to see what "special" ym2612 commands are being used. i have a feeling it's more likely related to timers than the "secret" THREE (not two) op mode channel 3 has.